How to use SDL2 GamPad-tool

I am using a genric GamPad and i installed SDL2 Gamepad and i mapped all buttons but how to use this thing please..

Desktop (please complete the following information):

• OS: [mac os x]
• Minecraft [(Tluancher)1.16.1]
• Fabric [fabric 0.9.2+build.174]
• Mods [e.g. aurora_keystrokes v1.0.0, modmenu v1.7.15]

Once you have the mapping string from SDL2 Gamepad, go into your minecraft folder, then go into the config directory and create a file called gamecontrollerdb.txt and paste the mapping string in that file.

Please note that wireless controllers might not work correctly on Linux and macOs because of a bug in the library used by Minecraft.

Just upgrade glfw to the version which higher than 3.3.